浅埋近距离煤层群工作面支架选型技术研究  

Research on support selection technology for shallow buried close distance coal seam group working face

作　　者：闫俊杰 范宇 孙利辉 YAN Junjie;FAN Yu;SUN Lihui(Huajin Coking Coal Company Limited,Lvliang 033000,China;School of Mining and Geomatics Engineering,Hebei University of Engineering,Handan 056038,China)

机构地区：[1]华晋焦煤有限责任公司,山西吕梁033000 [2]河北工程大学矿业与测绘工程学院,河北邯郸056038

出　　处：《建井技术》2024年第3期16-20,53,共6页Mine Construction Technology

基　　金：国家自然科学基金项目(52074100);内蒙古“科技兴蒙”行动重点专项(2022EEDSKJXM009)。

摘　　要：为了确保浅埋近距离煤层群工作面的安全高效开采,以陕西神木矿区锟源煤矿近距离2-2煤采空区下,3-1煤工作面开采作为工程背景,采用理论分析、数值模拟和相似模拟的研究方法,分析近距离煤层上层煤开采后,下分层3-1煤工作面开采时工作面支架的合理支护强度。理论计算工作面支架支护强度为0.695 MPa,数值模拟3-1煤工作面支架支护强度为0.4~0.77 MPa,相似模拟3-1煤工作面支架支护强度为0.45~0.78 MPa,该工作面工作阻力大于7 435 kN,与现场实测数据相吻合。由此表明,现有支架选型不满足支护要求,选用支护阻力为8 200 kN的液压支架可满足工作面支护要求。该研究补充了在浅埋近距离煤层群开采情况下工作面支架选项技术研究,为神木地区浅埋近距离煤层群的安全高效回采提供了理论依据。In order to ensure the safe and efficient mining of the working face of the shallow-buried close-distance coal seam group, the mining of the 3~(-1) coal working face under the close-distance 2~(-2) coal goaf in the Kunyuan Coal Mine of Shaanxi Shenmu Mining Area is taken as the engineering background. The research methods of theoretical analysis, numerical simulation and similar simulation are used to analyze the reasonable support strength of the working face support during the mining of the lower 3~(-1)coal working face after the upper coal mining of the close-distance coal seam. The theoretical calculation of the support strength of the working face is 0.695 MPa. The numerical simulation of the support strength of the 3~(-1) coal working face is 0.4~0.77 MPa. The similar simulation of the support strength of the 3~(-1) coal working face is 0.45~0.78 MPa. The working resistance of the working face is greater than 7 435 kN, which is consistent with the field measured data. It shows that the existing support selection does not meet the support requirements, and the hydraulic support with support resistance of 8 200 kN can meet the support requirements of the working face. This study complements the research on the support option technology of the working face under the mining of shallow-buried close-distance coal seams, and provides a theoretical basis for the safe and efficient mining of shallow-buried close-distance coal seams in Shenmu area.

关 键 词：浅埋煤层 煤层群开采 台阶岩梁 支护强度 支架选型 

分 类 号：TD355.4[矿业工程—矿井建设]